Qbasic 2-dimentional array

Hello,
I have an assignment to create an airline reservation system. The problem that I am having is that all of the examples that I have found for multidimentional arrays show the array using DATA statements. I am having trouble finding a good example allowing user input into the array. Specifically, that would allow the user to specify both the data and the exact location of the array to display the data.

Does anyone have a good source for examples/tutorials?